JP2897935B2 - Shift lock release device for automatic transmission - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shift lock release device for an automatic transmission provided in a vehicle such as an automobile.

(Prior Art) In recent automatic vehicles, when a vehicle is stopped at the time of parking or the like and a shift lever of an automatic transmission is put into a parking range, the shift lever is automatically locked and the shift lever is automatically shifted. Shift lock mechanisms for preventing accidental movement of the lever and preventing movement of the vehicle are being equipped from a safety aspect.

By the way, in a vehicle equipped with such a shift lock mechanism, the shift lock is automatically released in conjunction with the operation for starting, and for example, the engine is turned on by turning on an ignition switch. This is performed by detecting a start state and a depressed state of a brake pedal.

However, it is conceivable that disconnection of wiring or malfunction of the solenoid used in the above-mentioned shift lock mechanism may occur.In this case, the shift lock mechanism remains operating even though the ignition switch and brake pedal are operated. Since a situation occurs in which the lock of the lever cannot be released, a shift lock release device for manually urgently releasing the shift lock is also required.

For example, Japanese Utility Model Laid-Open Publication No. 1-132427 discloses a key cylinder A as a shift lock release device as shown in FIG.
A technology is disclosed in which an ignition key K is inserted into a lock lock mechanism, and a link B in a shift lock mechanism is rotated by a tip of the key K to release the lock.

According to this, even if the shift lock mechanism malfunctions in the shift lock state, the shift lock state can be artificially released from the vehicle in an emergency, and the emergency release can be performed using the ignition key. Therefore, there is an advantage that is useful in crime prevention.

(Problems to be Solved by the Invention) However, according to the technology disclosed in the above-mentioned publication, the tip of an ignition key K inserted into a key cylinder A is connected to a link B.
And the key K is pushed in to rotate the link B directly. Since the link B is pushed by a small and thin ignition key K, it is difficult to apply a force and the operability is lacking. There is.

Accordingly, it is an object of the present invention to provide a shift lock release device for an automatic transmission, which has good operability while releasing a shift lock using an ignition key.

(Means for Solving the Problems) That is, the present invention includes a shift lock mechanism for locking the shift lever at a predetermined shift position, and a key cylinder for releasing the shift lock by the mechanism by an unlocking operation using a key. In the shift lock release device for an automatic transmission, the key cylinder is an outer cylinder, and an inner cylinder that is held in the outer cylinder so as to be rotatable and slidable in the axial direction and is rotated by the key operation; A spring member for projecting from the outer cylinder at a predetermined rotational position, and an interlocking member for unlocking the shift lock mechanism in conjunction with an operation of pushing the protruding inner cylinder into the outer cylinder is provided. It is characterized by the following.

(Operation) According to the above configuration, if the inner cylinder is rotated by the key inserted into the key cylinder and unlocked, the inner cylinder pops out of the outer cylinder by the force of the spring member. The locked state of the shift lock mechanism can be released by the interlocking member by pushing in with the above key. In this case, the pressing of the key is guided using the fitting of the inner cylinder and the outer cylinder, and the outer cylinder supports the sliding inner cylinder on a relatively large surface. It will be easier, smoother and more secure.

Next, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a shift lever 1 of an automatic transmission has its lower end pivotally attached to a bracket 3 provided on a vehicle body side by a support shaft 2 and a detent pin 4 is provided on a side surface of the shift lever 1. The detent pin 4 protrudes into the gate 7 of the detent plate 6 attached to the bracket 3 in a state where the detent pin 4 can be moved up and down by operating a knob 5 attached to the top of the shift lever 1. .

On the other hand, the gate 7 of the detent plate 6 has
A parking range engaging portion P, a reverse range engaging portion R, a neutral range engaging portion N, with which the detent pin 4 engages corresponding to each select range of the shift lever 1,
And a shift range engaging portion of D, D ₁ , D ₂ is formed, the shift lever 1 is shifted in a state where the detent pin 4 is lowered by pushing the knob 5, and the knob 5 is released at the selected range position. Thus, the detent pin 4 is configured to be engaged with any of the above-described engaging portions. In this case, a cover 9 is provided to cover the detent plate 6 and a shift lock mechanism 8 described below, and a guide groove 10 is formed in the cover 9 in the shift direction of the shift lever 1. Projected upward through 10.

Further, a shift lock mechanism 8 of the shift lever 1 is incorporated in the above automatic transmission. The shift lock mechanism 8
The lock lever 11 comprises a lock lever 11 which is turned around the support shaft 2 of the shift lever 1 and a solenoid 12 which pushes and pulls the lock lever 11 to rotate. As shown in FIG. When the vehicle is shifted to the parking range and the detent pin 4 is engaged with the parking range engaging portion P, the lock lever 11 is pulled to the illustrated position by the solenoid 12, and the upper end 11a of the lock lever 11 is moved to the detent pin. 4, the lowering of the detent pin 4 is prevented, whereby the shift lever 1 is locked in the parking range.

In the shift lock mechanism 8, an ignition switch (not shown) is operated by an ignition key K (the fourth key).
(Shown in the figure), the engine is started, and when the driver depresses the brake pedal, the solenoid 12 pushes the lock lever 11 to the left side in FIG. 1 to unlock the shift lever 1. ing. Therefore, the shift lock mechanism 8 does not operate when the engine is not stopped, and the shift lever 1 can be freely shifted from the parking range to another range.

In this embodiment, the shift lock release device 13 according to the present invention is provided at the upper position corresponding to the parking range engagement portion P of the detent plate 6 inside the cover 10 in this embodiment. Is equipped with

As shown in FIGS. 1 to 3, the shift lock release device 13 includes a base plate 14 fixed inside the cover 9, a key cylinder 16 fixed to the base plate 14 by screws 15, 15, and a raised position. The key cylinder 16 includes an interlocking rod 17 that is driven by the key cylinder 16 in a downward direction from a state in which the key cylinder 16 is driven, and a cam arm 18 that rotates as the interlocking rod 17 is driven. The shift lock is released by operating the key K.

That is, the key cylinder 16 includes an outer cylinder 19 fixed to the base plate 14, and an inner cylinder 20 that is inserted into the outer cylinder 19, and is rotatable and vertically slidable.
The key insertion hole 21 provided on the upper surface of the inner cylinder 20 is disposed in a desired state to the outside through the guide groove 10 in the cover 9, and only when the ignition key K is inserted into the key insertion hole 21. The rotation operation is enabled.

The lower part of the inner cylinder 20 is the base plate 14.
Extending downward through the base plate 14
A flange 22 is formed on the peripheral surface between the outer cylinder 19 and the outer cylinder 19, and a spring member 23 that pushes up and urges the inner cylinder 20 is interposed between the flange 22 and the base plate 14. The inner cylinder 20 has a collar
Upper and lower two projections 24 and 25 are formed at a position above 22. The upper projection 24 is for returning rotation of the inner cylinder 20, and the lower projection 25 is for driving the interlock rod 17.

On the other hand, the notch is formed on the peripheral surface of the outer cylinder 19 from the lower end of the outer cylinder to the upper side and over a width range of about 90 degrees of the outer cylinder 19.
26 is formed, and communicates with the notch upper portion 26 and has two upper and lower engaging portions 27 and 28 (however, the lower engaging portion 2
8 utilizes the lower end of the outer cylinder 19). Then, the rotation return projection 24 of the inner cylinder 20 is provided on the upper engagement portion 27.
Are engaged, and the driving projection 25 is engaged with the lower engaging portion 28, and this state is the locked state of the key cylinder 16. Further, in order to maintain the engagement in the locked state, a spring member 30 is stretched over the rotation return projection 24 and the bracket 29 extended from the outer cylinder 19, and the inner cylinder 20 is moved to the locked position by the spring force. Are biased in the rotational direction.

The above-mentioned interlocking rod 17 is vertically penetrated and held by a box 31 fixed to the base plate 14 on the front surface of the notch 26 of the key cylinder 16.
It is urged upward by receiving the spring force of a spring member 32 provided therein through a flange plate 33.

The cam arm 16 is rotatably supported at one end by a boss 35 on a support shaft 34 supported by the base plate 14, and is disposed such that the other end is located below the interlocking rod 17; A pressure receiving surface 18a with which the lower end of the rod abuts is formed at the other end, and a lock lever 11 of the shift lock mechanism 8 is provided at a portion opposite to the pressure receiving surface 18a.
Is formed in the lock releasing direction. A substantially L-shaped bent portion 11b is provided at the upper end of the lock lever 11 corresponding to the projection 18b.

Further, in the shift lock release device 13, the outer cylinder
In the locked state in which the projections 24, 25 of the inner cylinder 20 are engaged with the engagement portions 27, 28 of the 19, the spring member 23 is moved to the height where the key insertion hole 21 of the inner cylinder 20 substantially coincides with the upper end of the outer cylinder 19. It is drawn into the outer cylinder 19 in opposition.

Then, when the ignition key K is inserted into the key insertion hole 21 from this state and the inner cylinder 20 is rotated substantially 45 degrees against the spring member 30, each of the projections 24, from each of the engagement portions 27, 28.
The inner tube 20 is pushed up by the force of the spring member 23 and the projections 24 and 25 are raised. In that case, the inner cylinder 20 is
Rises until it contacts the lower end of the outer cylinder 19 (or until the rotation return projection 24 contacts the inner top of the notch 26), and raises the drive projection 25 to a position beyond the upper end of the interlocking rod 17. .

Then, when the inner cylinder 20 is further rotated by 45 degrees from the above-mentioned raised state, the driving projection 25 is arranged to be directly above the interlocking rod 17.

Therefore, even if an operation for starting is performed from a state in which the shift lever 1 is locked in the parking range by the shift lock mechanism 8, the locked state of the shift lever 1 is not automatically released for some reason. If this occurs, in the shift lock release device 13, the ignition key K is inserted into the key insertion hole 21 and the inner cylinder 20 is first rotated by 45 degrees, so that the projections 24, 25 are disengaged from the engaging portions 27, 28, and the inner cylinder 20 protrudes to the position shown by the dashed line in FIG.
It rises to the position a in the figure. Then, by rotating again by 45 degrees, the driving projection 25 moves to the position b just above the interlocking rod 17.

For this reason, the inner cylinder 20
Is pushed into the outer cylinder 19, the driving projection 25 descending with the inner cylinder 20 pushes down the interlocking rod 17 against the spring member 32, and the interlocking load 17 pivots the cam arm 18
34, the protrusion 18b of the cam arm 18
Pushes the lock lever 11 of the shift lock mechanism 8 to retreat from the lock position. Therefore, the lock of the shift lever 1 is artificially released.

In this case, the lock release device 13 causes the inner cylinder 20 into which the ignition key K is inserted to once protrude from the outer cylinder 19 and depresses the inner cylinder 20 to release the lock. Therefore, the pushing operation is performed in a state where the inner cylinder 20 is supported by the outer cylinder 19 by a relatively wide surface, so that it becomes easier to apply a force to the ignition key K and the inner cylinder 20 slides smoothly. The lock is reliably released with good operability.

Note that the shift lock release device used to release the lock
13 is returned to the original state by the ignition key K.

In the above embodiment, the interlock rod 17 and the cam arm 18
Are separated from each other, but a link structure may be used in which the two are connected to each other. Also,
The projections 24 and 25 provided on the inner cylinder 20 may be single projections for driving.

(Effects of the Invention) As is apparent from the above description, according to the present invention, when the inner cylinder is rotated by the key inserted into the key cylinder to perform the unlocking operation, the inner cylinder is actuated by the force of the spring member. Then, when the inner cylinder is pushed in with the above key, the locked state of the shift lock mechanism can be released by the interlocking member. Then, in this case, the pushing of the inner cylinder by the key is guided using the fitting of the inner cylinder and the outer cylinder, and the outer cylinder is supported on the sliding inner cylinder by a relatively large surface. It is easy to apply force to the key, and smooth and reliable pushing can be expected. Therefore, the operability for unlocking the shift lock device is improved.

[Brief description of the drawings]

1 shows an embodiment of a shift lock release device according to the present invention. FIG. 1 is a schematic configuration diagram of a shift lever portion of an automatic transmission, FIG. 2 is an enlarged front view of the shift lock release device, and FIG. Is a plan view, and FIG. 4 is a perspective view of a key cylinder portion. FIG. 5 is a schematic configuration diagram of the prior art. 1 ... shift lever, 8 ... shift lock mechanism, 13 ...
Shift lock release device, 16 …… Key cylinder, 17,18…
... interlocking members (17 is an interlocking rod, 18 is a cam arm), 19 ...
... outer cylinder, 20 ... inner cylinder, K ... ignition key.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B60K 20/00-20/08 F16H 59/00-59/12

Claims (1)

(57) [Claims] A shift lock release device for an automatic transmission, comprising: a shift lock mechanism for locking a shift lever to a predetermined shift position; and a key cylinder for releasing a shift lock by the mechanism by an unlocking operation using a key. The key cylinder includes an outer cylinder, an inner cylinder that is rotatably and axially slidably held in the outer cylinder, and is rotated by the key operation. An automatic shifting mechanism having a spring member for projecting from the cylinder, and an interlocking member for unlocking the shift lock mechanism in conjunction with an operation of pushing the projected inner cylinder into the outer cylinder. Machine shift lock release device.